View Code of Problem 48

#include <stdio.h>
int main()
{
  int n,i,temp;
  double a1 = 1.0,a2 = 2.0;
  double sum = 0;
  scanf("%d",&n);
  if(n>=1&&n<=10)
  {
    for(i=0;i<n;i++)
    {
      sum = sum + a2/a1; 
		    temp = a2;
      a2 = a1 + a2;
      a1 = temp;
    }
  }
  printf("%.6lf",sum);
  return 0;
}